Inverted incandescent gas-lamp.



UNl'rED Stearns iat'rna'r omiten.

-UITLV EAA?. l BERLIN. GERIANY. ASSIGNOR 'IO SELAS GEBELLSCHAIT IIT BESCHINKTER HAFTUNG. 0F BERLIN, GERMANY.

TNVIRTED INCANDESCENT GAS-LAMP.

Ipeutttolttton o! Letters latent.

Patented Feb. l5, 1010.

Application ated February 7. 1907. Seniat No. 356.132.

'l'o all altam it may concern:

Be it known that l, Gos-'mv Raar, u subject of the Emperor of Germany, residing at 36a llhunenstrasae, Berlin, Kingdom of lrnwia, Empire of Germany, engineer, have invented certain new and useful Improvementsio Inverted lncandeacent. Gas-Lamps, of which the following is u sgweilieation.

.'l'hi invention haafor its. object an inverted ineandescenggas burner, in which b v makin f the metal walls of'the burner head iii and o the mixing tube of appropriato thickness, and if deeircd in combination with means for conducting away the heat. a regulation ot' the heating etleet is obtained. Itia essential that a largo amount of metal vahot'thlbe available for ther uan'tit) of heat supplied to the burner` heat and that thoy quantity of 'heat eonductedto this mass of metal should be carried oliA in a reliable mannei.` By this means numerous advantages are feeured. The burner head and mixing tubo are prevented from being rendered in candeneent or from being heated to an e.\'- tent endangering the durability of the metal. The mnuluetion ot' the combustion granen to the outer aide of the burner head earrying the inoandeseing mantle ran then be car tied out in sach a wa)l that the burner head is heated to the smallest possible extent. Aa a result an extreinel)I hot llame may be em ploye'd and a larger illuminating power may e secured at ordinary gaa prenonor hy lucana of high, prt-ure gms.

in order to obtain a speeialh high honinona etlieieney. it in never-'muur to enpply rather more air to` the eomlnrdible. at the hurncr nozzle than i` ordinarily the ruhe. iu i order that while employing a relatively #wat dirrlulrge \el oeit.\' at tl of tho harm-r headla short thick llame muv he maxim-od. Hut-h a llame naturally han a tendency to light back dirongh tho mixing.' tube toward the nozzle. weary. il' it is de-ired to tot' auch a llame (il exception be made. ol' special small type ot'-hur|a-rs,) to hoort at the'mouth ot' the burner head an etl'eetive sieve.. lining: tol

the t'al't that the enntlmotion newa do not ascend into the interior of the mantle.ex revolve heating.r and buruinn away otthe nuevo maerted in the gas .-\tppl pipe is avoided.

Uther important advantages uro likewise a` month piero lt -ia tberefm'e neea horizontal section throngr the [turnen head. Fig. :l show on an enlarged scalo a eonatruetiomil .form of the sieve inserted in tho novel lamp.

Radial ribs 4 proceed from the mouth 3 of the burner head und aro connected one with the other b v moana ot' a cylindrical portion o. Further radial ribs 6 proceed from the exterior of the cylindrical portion 5 and are connected one with 'the other by a ring 't'. The ritoi T is connected with the lamp casing 8, antibv means of a hinge t) or the like earrirnthe lamp globe 10 which when the catch ll is loosened may be swung downward in the known manner.

.is shown in Fig. '.3 the radial ribs 4 ofthe burner head are covered with heat insulating material tzt. 'in the nume manner the inner fare of the vlii'nlrieal tart. 5 and the outer fare of the rylindrira mrtion li of the burner head uhirh lita tite roiiieal monthpiece It are eo\ ered with in-atlating material 1;. Preferably inmiluting material is likewise, provided on the lower aide of the burner head. in the eototructioiml `forni here represented the upper end of the mixin,i r tube tt which openainto the 'ab suppljrl pipe 1: of the burner bead i-` litewi-t-ex ternally eovered with inmlating material lo.

ln order that l-mal| ineandeseing mantle. may be emlplo'ved. the mantle l is connected with the o iturating aleen .2 provided with heat inhalation material. and which may 'no tixrd to the mouth il oi the burner head ia an)l appropriate known manner, for example h vy means ot' a bayonet joint. 'ihe .sleeve Lt l tits snugly upon the mouth Il of the burner head. o an to forni a tight joint between tla` mantle and Imid mouth. whereby .the eonilntation gaseoare l'orred to panav through the month-it and unread on ita outer aide.

'hen the lump ia burning. the gan', auch ahigh pressure ga for multiple. is supplied through ttoI rutppb` pipe tt and the paaaage 1.'. to the mantle l. l`he neet-waar uit' pust through the opening li' ol the farting 8 of the lamp into the interior of th lamp and iight joint therewith, and a sieve arranged head having a comparatively thick metal r'eqtion c'raini the lnglh of said eti-ipe, the 'all and a plurality of ribs radiating from stripe being con ed spira ly. 1o uid metal wall, a mantle having ita upper In v'ritneee whereof I have hereunto set my rim secured upon the burner hea to form a hand 1n the presence of two witnesses.

` GUSTAV RAAP. intermediate of aaid burner head and num- Witnesses: ile, said sieve being formed of stripe of alice'. \Vowi:.\|.\a HA mfr, metal having eormgntionl disposed in a di- Huur Hum. 

